To everyone that attempted to answer my question about swallowing sputum I'd like to say thank you. I will continue using the tissue and not swallowing it.
I have another question: Can back pain impede your breathing. Background is I have a suspected trapped nerve in the Thoracic Spine. The pain I get in that area is like a tearing/burning sensation. However I get very painful stabbing sensations in my left scapula area, down my left arm nearly to the elbow and across my left chest to my sternum. In fact it feels as though something is being pushed from my spine and shoulder right through my chest. When I walk I have to sit down every 5 - 10 mins against something with a back rest and that relieves the pain almost fully. I also have surface numbness in the shoulder, arm and chest. I had an MRI Scan on Saturday and just awaiting the result.
It does effect my breathing in the sense that it is so painful, until I sit. My question is can it have a deeper impact on my lungs.